Chair.



l. R. HINVIAN.

CHAIR.

APPLICATION FILED IuLY 24,19I3.

Patented Dec. 1 4, 1915.

V-Ilml- A fmw 52,14,

iraniano.

JUIEIN Rf. HNMAN, F NDNAPOLLS, NDMA.

GHAXR..

Specification of Letters Patent.

rateiited nee. in., init.

application filed. July 2t, 19,13. Serial No. 730,821.

To aZZiuzom t may concern Be it known that ll, JOHN R.' HINMAN, a citizen of the United States, residing at lindianapolis, Marion county, and State of indiana, have invented and discovered certain new and useful llmprovements in Chairs, of which the following is a specification.

My invention relates to chairs and its .object is to provide an opera chair having means for rigidly holding the folding seat against lateral displacement and having means to enable the chair to be adjusted to floors of di'erentslopes.

With these objects and others in view my invention is embodied in preferable form in the article hereinafter described.

The invention is` illustrated in the accompanying drawings in which- Figure 1 is a front view in elevation of the chair; Fig. 2, a vertical section, showing the seat down; Fig. 3, a vertical section.

showing the side folded up; Fig. 45a section on the line 4 4 of F ig. 2; Fig.. 5, a section on the line 5-5 of Fig. 3; Fig. 6,

a detail of slot and pin connection for seat;

Fig. 7, a section on the line 7 7 of Fig. 2; and Fig. 8, a section on line 8--8 of Fig. 3.

Referrin to the drawings, the body of the chair is preferably made entirely of metal, the side frames 1 having vertical strengthening flanges 2 and arm members 4 and being joined to a back meinbert'i, all these parts being either formed from a vsingle piece or welded together to form an integral body. A horizontal front brace 6 connects the two side frames, and a rear brace 3 also connects said side members and serves as a foot-rest. o

A seat 7 suitably pivoted in the frame is provided and this seat is also preferably of metal. l `i e Secured tor the bottom of the seat 7v on each side thereof is a plate 8 provided-with an ear 9 lhaving an aperture 10. ln this aperture ts a pivot pin 11- which iscarried at vthe upper end of a pivoted support-'1 ing arm 12. rlhe lower end of this arm is i of a groove formed by Hanges 14 of afbar. 15 suitably secured to the side frame of the chair and by means of which anges .the block is held against lateral escape*andi;inl sured a vertical movement in astraight The plate is also provided 'withjanearpjlf l'lo adjust the chair to which is provided With a key-hole slot 17 which is adapted to engage a correspondingly shaped pin 18 projecting from the side of the chair frame. The pin 18 in the tongue portion thereof is provided with a slot 19 with which engages the wall of the slot 17, whereby after the pin has been inserted in the slot, the plate and pin may lbe turned relatively to one another to permit of the swinging movement of the seat, while at the same time the tongue prevents the lateral disengagement of the plate and pin during such relative movement.

Each side frame of the chair is connected near its rear edge by a bolt 20 to a base plate 21 having a horizontal supporting flange 22. Near its front edge each frame is provided with a vertical row of apertures 23, through which and a single hole in the frame is passed a locking bolt or screw 24:. By means of this vertical row of holes and the removable bolt, the front ends of the frames may be adjusted up or down, swinging on the bolt 20 as a pivot, so as to thereby enable the chair to be adjusted to floors of did'erent slopes.

The arms 12 and the pivot pins18 constitute the sole supporting means for the seat and owing to this fact two 'arms are fprovided, one on each side and means are seat but will adord a'rigid support in such plane for the seat when the same is occupied. r 'llhese means consist of the rigid side `frames extending forwardly from the back of the seat and bolted toA the base member and-these side frames also constitute lmeans whereby the guide flanges in which the blocks move may be madeof strong sheet steel A and' welded to such supporting side frames. ln assembling the chair the slot 17 in the plate 8 carried by the seat 7 is slipped over the end of the pin 18 until-the wall of the slot engages in` the circumferential grooveorslot 19 onV the pin, whereupon the seat will be held firmly against lateral escape at leach end while at the saine time the plate-is-permitted to turn freely around the pin. ln raising the seat the block 13 will be carried up and downv in the vguideway formed by the Hang'eslt.

diderent inclina- V.Itions, the side frames are swung up or down 'jon'theipivot 20. and adjustably posil tion by means of the front bolts 24. The

pivotal adjustment thus provided permits oi the. adjustment of the chair to different inclinations of oors without changing 'the distance of the rear part of the seat from v the floor.

bers, means of pivotal connection betweenM said side members and base member at their rear ends permitting an adjusting swinging movement in an arc of a circle in a vertical plane of said frame with respect to said base member, means at the front ends of said side and base members for locking said parts together in the position to which they may be adjusted, and a seat carried by said frame so mounted as to be movable therewith to change the angle of the seat to the door as the frame is adjusted.

2. seating device 'having a rigid frame including'a back and side members extending forwardly from the back in combination laterally bracingnthe same, a horizontal pivot member connecting each side member` and a base member at the rear end of the latter and permitting an adjusting swinging movement of the frame on said pivot through a vertical plane, a seat carried by and movable with said frame in its angular adjustment relatively to the base members, means at the front end of the base members upon which the side members of the frame bear for support, and means for locking the said supporting means'rigidly to the base in different sitions of adjustment in said swinging mov ment of the frame.

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana, this eighteenth day of July, A. D. nineteen hundred and thirteen.

JOHN R. HINMAN. [1.. 8.]

Witnesses:

ZoRA ToMLINsoN, A. C. RICE. 

